Star profile

Gamma 2 Delphinus

3D likeness based on its real data · class K · ~4,200 K

What is Gamma 2 Delphinus

Gamma-2 Delphini forms, with its brighter companion Gamma-1, one of the finest visual binaries in the summer sky: two pale-gold suns some 126 light-years away, set in the small dolphin like a double droplet at the creature’s muzzle. It is a tempered orange K-type giant, and the pair splits cleanly through any amateur telescope, offering one of the most rewarding views for anyone meeting their first visual double in a calm summer night.

Where it is and when to see it

Gamma 2 Delphinus lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is August, when it culminates around midnight.

From London it culminates about 55° above the horizon.
From New York it culminates about 65° above the horizon.
From Sydney it culminates about 40° above the horizon.

It can be seen from anywhere north of 74° S.

It ranks no. 4 in brightness among the 18 stars of Delphinus in our catalogue. To find it, start from Rotanev, the brightest: it lies about 3° away (a fist at arm's length covers about 10°).

The light you see today left it about 130 years ago.

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Astronomical data for Gamma 2 Delphinus

Constellation: Delphinus
Apparent magnitude: 4.27
Distance: 126.3 light years
Coordinates (J2000): RA 311.665° · Dec 16.124°
Catalogue: HIP 102532 · HD 197964

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Other stars in Delphinus

Delphinus has 18 stars in Stelvia's catalogue. Here are a few of them.

See all 18 stars in Delphinus